A gun at rest on a smooth horizontal platform fires a bullet with a speed of relative…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

6\,\text{kg}

gun at rest on a smooth horizontal platform fires a

0.06\,\text{kg}

bullet with a speed of

500\,\text{m\,s}^{-1}

relative to the ground. Immediately after the bullet leaves, the gun experiences a constant horizontal resistive force of

24\,\text{N}

from the platform bearings. What is the speed of the gun

0.50\,\text{s}

after the shot, assuming the resistive force acts only after the bullet has completely left the barrel? (a)

4\,\text{m\,s}^{-1}

(b)

3\,\text{m\,s}^{-1}

(c)

2\,\text{m\,s}^{-1}

(d)

5\,\text{m\,s}^{-1}